During breeding season, starlings require
holes for nesting, as well as open fields for feeding. The usual nesting
sites are holes and crevices in trees, buildings, and rooftops. Starlings
also plunder other birds' nests and use them as their own.

Status

European starlings are non-native
birds that are displacing native cavity-nesting birds. They are
commonly seen in large flocks in suburban and rural areas.